/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8                               :vi │
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2021 Justine Alexandra Roberts Tunney                              │
│                                                                              │
│ Permission to use, copy, modify, and/or distribute this software for         │
│ any purpose with or without fee is hereby granted, provided that the         │
│ above copyright notice and this permission notice appear in all copies.      │
│                                                                              │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
│ PERFORMANCE OF THIS SOFTWARE.                                                │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/mem/gc.h"
#include "libc/testlib/ezbench.h"
#include "libc/testlib/testlib.h"
#include "net/http/escape.h"
#include "net/http/http.h"

TEST(IsAcceptablePath, test) {
  EXPECT_TRUE(IsAcceptablePath("*", 1));
  EXPECT_TRUE(IsAcceptablePath("/", 1));
  EXPECT_TRUE(IsAcceptablePath("index.html", 10));
  EXPECT_TRUE(IsAcceptablePath("/index.html", 11));
  EXPECT_TRUE(IsAcceptablePath("/index.html", -1));
  EXPECT_TRUE(IsAcceptablePath("/redbean.png", -1));
}

TEST(IsAcceptablePath, testEmptyString_allowedIfYouLikeImplicitLeadingSlash) {
  EXPECT_TRUE(IsAcceptablePath(0, 0));
  EXPECT_TRUE(IsAcceptablePath(0, -1));
  EXPECT_TRUE(IsAcceptablePath("", 0));
}

TEST(IsAcceptablePath, testHiddenFiles_notAllowed) {
  EXPECT_FALSE(IsAcceptablePath("/.index.html", 12));
  EXPECT_FALSE(IsAcceptablePath("/x/.index.html", 14));
}

TEST(IsAcceptablePath, testDoubleSlash_notAllowed) {
  EXPECT_FALSE(IsAcceptablePath("//", 2));
  EXPECT_FALSE(IsAcceptablePath("foo//", 5));
  EXPECT_FALSE(IsAcceptablePath("/foo//", 6));
  EXPECT_FALSE(IsAcceptablePath("/foo//bar", 9));
}

TEST(IsAcceptablePath, testNoncanonicalDirectories_areForbidden) {
  EXPECT_FALSE(IsAcceptablePath(".", 1));
  EXPECT_FALSE(IsAcceptablePath("..", 2));
  EXPECT_FALSE(IsAcceptablePath("/.", 2));
  EXPECT_FALSE(IsAcceptablePath("/..", 3));
  EXPECT_FALSE(IsAcceptablePath("./", 2));
  EXPECT_FALSE(IsAcceptablePath("../", 3));
  EXPECT_FALSE(IsAcceptablePath("/./", 3));
  EXPECT_FALSE(IsAcceptablePath("/../", 4));
  EXPECT_FALSE(IsAcceptablePath("x/.", 3));
  EXPECT_FALSE(IsAcceptablePath("x/..", 4));
  EXPECT_FALSE(IsAcceptablePath("x/./", 4));
  EXPECT_FALSE(IsAcceptablePath("x/../", 5));
  EXPECT_FALSE(IsAcceptablePath("/x/./", 5));
  EXPECT_FALSE(IsAcceptablePath("/x/../", 6));
}

TEST(IsAcceptablePath, testNoncanonicalWindowsDirs_areForbidden) {
  EXPECT_FALSE(IsAcceptablePath(".", 1));
  EXPECT_FALSE(IsAcceptablePath("..", 2));
  EXPECT_FALSE(IsAcceptablePath("\\.", 2));
  EXPECT_FALSE(IsAcceptablePath("\\..", 3));
  EXPECT_FALSE(IsAcceptablePath(".\\", 2));
  EXPECT_FALSE(IsAcceptablePath("..\\", 3));
  EXPECT_FALSE(IsAcceptablePath("\\.\\", 3));
  EXPECT_FALSE(IsAcceptablePath("\\..\\", 4));
  EXPECT_FALSE(IsAcceptablePath("x\\.", 3));
  EXPECT_FALSE(IsAcceptablePath("x\\..", 4));
  EXPECT_FALSE(IsAcceptablePath("x\\.\\", 4));
  EXPECT_FALSE(IsAcceptablePath("x\\..\\", 5));
  EXPECT_FALSE(IsAcceptablePath("\\x\\.\\", 5));
  EXPECT_FALSE(IsAcceptablePath("\\x\\..\\", 6));
}

TEST(IsAcceptablePath, testOverlongSlashDot_isDetected) {
  EXPECT_FALSE(IsAcceptablePath("/\300\256", 3));
  EXPECT_FALSE(IsAcceptablePath("/\300\257", 3));
  EXPECT_FALSE(IsAcceptablePath("\300\256\300\256", 4));
}

BENCH(IsAcceptablePath, bench) {
  EZBENCH2("IsAcceptablePath", donothing, IsAcceptablePath("*", 1));
  EZBENCH2("IsAcceptablePath", donothing, IsAcceptablePath("/index.html", 11));
}
